Filter



FIG. 1 is a front, top, and right side perspective view of a first embodiment of a filter;

FIG. 2 is a rear, bottom, and left side perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a left side elevational view thereof;

FIG. 8 is a right side elevational view thereof;

FIG. 9 is a front, top, and right side perspective view of a second embodiment of a filter;

FIG. 10 is a rear, bottom, and left side perspective view thereof;

FIG. 11 is a front elevational view thereof;

FIG. 12 is a rear elevational view thereof;

FIG. 13 is a top plan view thereof;

FIG. 14 is a bottom plan view thereof;

FIG. 15 is a left side elevational view thereof; and,

FIG. 16 is a right side elevational view thereof.

The broken lines shown in the figures are for the purpose of illustrating portions of the filter that form no part of the claimed design. 

CLAIM The ornamental design for a filter, as shown and described. 